Description
It seems that "CipherInputStream" and ''CipherOutputStream' are more friendly to the users who are familar with Java Cryptography Extension(JCE).
Java(JCE) use the name 'CipherInputStream' and 'CipherOutputStream'
(see javax.crypto.CipherInputStream & javax.crypto.CipherOutputStream).
btw, Bouncy Castle Crypto library also use the name 'CipherInputStream' and 'CipherOutputStream'.